参数-mailboxcredential的含义是什么？

我正在写有关Exchange PowerShell命令。

当我想要使用下面的cmdlet时，我必须插入参数-mailboxcredential

• Test-OwaConnectivity
• Test-OutlookWebServices
• Test-ImapConnectivity
• Test-PopConnectivity

在微软官方网站上写着：

MailboxCredential参数指定单个URLtesting的邮箱凭证。

• LAMP服务器域不能发送电子邮件到Exchange服务器域。不同的IP，但在同一networking上
• Exchange 2010电子邮件转发与filter
• Exchange 2007 – 如何使用导出邮箱function？
• 在Exchange 2010 OWA中redirect循环
• 交换证书问题

我不知道为什么这个参数是必要的。 我插入了不正确的凭据，但是该命令已成功完成。 你能告诉我为什么这个参数是必要的吗？

示例（错误/不正确的凭证）

 [PS] C:\>Test-WebServicesConnectivity -ClientAccessServer EXhub1 -MailboxCredential (Get-Credential blablabla) CasServer LocalSite Scenario Result Latency(MS) Error --------- --------- -------- ------ ----------- ----- EXhub1 Default-Fi... GetFolder Failure [System.Net.WebExcept... 

没有参数：

 [PS] C:\>Test-WebServicesConnectivity -ClientAccessServer EXhub1 WARNING: Test user 'extest_91ef41d34eef4' isn't accessible, so this cmdlet won't be able to test Client Access server connectivity. Could not find or sign in with user ********\extest_91ef41d34eef4. If this task is being run without credentials, sign in as a Domain Administrator, and then run Scripts\new-TestCasConnectivityUser.ps1 to verify that the user exists on Mailbox server EXHUB1.****** + CategoryInfo : ObjectNotFound: (:) [Test-WebServicesConnectivity], CasHealthCouldN...edInfoException + FullyQualifiedErrorId : FB9A14B6,Microsoft.Exchange.Monitoring.TestWebServicesConnectivity WARNING: No Client Access servers were tested. 

 Test-WebServicesConnectivity -ClientAccessServer EXhub1 -MailboxCredential (Get-Credential blablabla)|Format-List *